Device for drying paper with segmented heating metal tapes

Abstract

The invention relates to a device for drying paper with segmented heating metal tapes, which comprises a large-diameter drying cylinder, a metal heating tape device and a humid air suction box, wherein the metal heating tape device is uniformly distributed on the outer cylindrical surface of the large-diameter drying cylinder below paper feed guide rolls and paper delivery guide rolls, the metal heating tape device comprises metal tapes, guide and tensioning driving rolls erected in the metal tapes and electromagnetic inductive heaters, two of the guide and tensioning driving rolls are pressed on the outer cylindrical surface of the large-diameter drying cylinder at the same diameter, the other driving roll is connected with a motor, and one electromagnetic inductive heater is mounted in each metal tape. By using the invention, paper can be coated on the large-diameter drying cylinder by means of the segmented electromagnetic inductive heating metal tapes so as to heat and dry the paper, thereby reducing the heat resistance between a heating body and the surface of the paper, improving the drying efficiency, reducing the length of a drying part and minimizing the difference between both sides of the dried paper. Besides, the drying and shrinkage of the paper are restricted, thereby increasing the tensile strength of the paper.

Description

technical field [0001] The invention relates to a drying method and equipment of a paper machine, more specifically, to a device for drying paper with segmented heating metal belts. Background technique [0002] In the wet papermaking process, after mechanical dehydration, the paper still contains a large amount of water, which must be removed by drying. The traditional drying method is to use a drying cylinder and use steam as the heating medium to dry the paper sheet. Because this method uses the very rich low-pressure steam in the paper mill, the operating cost is low and it is widely used in the paper industry. However, with this method, it is usually necessary to use multiple dryer groups in the paper drying section to meet the paper dryness requirement, and as the speed of the paper machine increases, the drying capacity increases. Increase the number of drying cylinders to meet the drying demand. However, increasing the number of drying cylinders means the extension...

AI Technical Summary

Problems solved by technology

Moreover, this method uses a combination of a complex multi-layer fabric and a back cooling device to dry the paper. On the one hand, the paper cannot be heated on both sides. cause heat loss

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